Mechanism of leg stiffness adjustment for hopping on surfaces of different stiffnesses.

@article{Farley1998MechanismOL,
  title={Mechanism of leg stiffness adjustment for hopping on surfaces of different stiffnesses.},
  author={Claire T. Farley and Han Houdijk and C Van Strien and Melissa Louie},
  journal={Journal of applied physiology},
  year={1998},
  volume={85 3},
  pages={1044-55}
}
When humans hop in place or run forward, leg stiffness is increased to offset reductions in surface stiffness, allowing the global kinematics and mechanics to remain the same on all surfaces. The purpose of the present study was to determine the mechanism for adjusting leg stiffness. Seven subjects hopped in place on surfaces of different stiffnesses (23-35,000 kN/m) while force platform, kinematic, and electromyographic data were collected. Leg stiffness approximately doubled between the most… CONTINUE READING
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